Controlling apparatus.



N. WBRL.

GONTROLLING APPARATUS. APPLICATION FILED AP. 1, 1909.

Patented Oct. 25, 1910.

4 SHEETS-SHEET 1.

N. WBRLE.

OONTBOLLING APPARATUS.

`.nr'nmuxolsr FILED Amm. 1009.

rPatented 00125, 1910.

N. WERLE. GONTBOLLING APPARATUS. v

APPLICATION FILED APB. 1, 1909. I 974,006, f Patented oe1;.25,1910.v

4 SHEETS-'SHEET 3.

N. WERLE. GONTBOLLING APPARATUS.

APPLICATION FILED APB. 1, 1909. l v 974,006, Pantea oct. 25,1910.

' ing being show various parts of the machine; Fig. 4 isv Fig. 11 is aview,

UNITED STATES PATENT OFFICE.

NIXOLAUS WEBL, OF STUTTGART, GERMANY, ASSIGNOR 0F ONE-HALF T0 ALOISSALCHER, 0F INNSBRUCK, AUSTRIA-HUNGARY'.

CONTROLLING PPABATU. l

citizen of the German Empire, residing at Stuttgart, inthe Kin dom ofWrtember Empire of Germany, ave invented certaln new and useful Imrovements in Controllin Apparatus; andp I do hereby declare thefolIowlng to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to Which it appertains tomake and use the same.`

Myinvention relates to calculating machines designed to perform examplesof addition or subtraction, and in which the subtraction is accomplishedas an addition operation so far as the mechanical processes areconcerned, but in which machine certain supplemental columns of figuresare provi ed for use when subtraction processes are to be performed.

My invention includes general structure of machines of the type abovespecified, and also 'certain minor plicable to machines of the typespecified and contributing to. the operation of the machine as a whole.

In the drawings: Figure 1 is a'view showing the machine in plan; Fig. 2is a view of the machine as seen from a point beneath it looking up;Fig. 3 is a view showing the machine in plan, the cover for the transfermechanism, and a part of the frame or casbroken away, in order to bettera viewr showing a section upon a vertical transverse plane; Fig. 5 istion to better show the transfer mechanism; Fi 6 is a view showingdetails of certain locing mechanism upon a larger scale; Figs. 7 and 8are views showing details of certain aero-setting mechanism upon anenlarged scale; Fig. 9 is a view showing details, upon a larger scale,of certain indicating mechanism and the operatingmeans therefor; Fig. 10is a view showingdetails certain transfer mechanism andalso portions ofrecording or indicating mechanlsm;

upon a lar e scale, showing the number plate arrang for performing.addition operations, and; similarv view, the number plate 'ranged forsubtraction.'

ing ar- Speeieation ol Letters Patent. -i

Application led April 1, 1909.

. certain recording or auxiliary features ap `ing 7 aside view with, thecover for the transfer mechamsm 1n sec-vv 12 risa' e Patented Oct. 25,1910. serial No. 4s1,s2s.

although a reater or lesser number maybe emdployed. hese slides aremovable longi- 1 them to tu nally for the purpose of settin correspondwith a number to be atled to or subtracted from an amount indicated byor indicating mechanism forming a part of the machine, to which end theyare provided each with an` operating knob 3. 4

7 'is the casing or frameof the machine Within which lthe greater partof the elements of the machine arev lnclosed and by means of which allare supported, Whic casing is provided with slots 10 through which aprolongation of the knobs 3 extends and which slots therefore formguides for the said knobs and for one end 'of the slides 2. The ends ofthe slldes remote from the knobs are provided with pointers 1, eachslide havin one upon either si e as shown particularly in Figs. 11 and12.

The reference characters 22 desi nate racks, one for each slide 2,arranged wlthin the casing 7 and connected at one end with the slides 2by means of y jecting portion of the knobs 3, and having at their otherends pins 43 which roject upward through slots 44 formed intlie casandcoperate with transfer mechatwo pointers arranged a downwardly pronismto be hereinafter described. The knob i 3 and the pin 43 of each slidetherefore serve as" guides for each endof the slides 22 as saidknob andpin m'ove in the slots 10 and 44 formed in the casin 7 and 'said racksare adapted to engage an operate a nseries of number Wheels or disks '17which form part of the indicating mechanism for showing at all times thetotal or net result of a seriesof .additions or subtractions.

The pointers of the slides 2 move over a number plate 6- upon Which'areplaced vari ous columns oflfguresused insetting the slides 2preliminarily toadding or subtracting a preconceived number.7 The plate6 is 'movable transverse tothe machineby means'of a' handle 8 to bringthe proper lcolumns of the machine is to be lus'e'ddforv addition orsub.

figures beneath ythe pointers 1 according" as l not for the present tobe traction, and Vthis number plate is covered by a vsecond or coverplate 11 arranged over the slidevs 2 and having a luralityof slots, twofor each slide, as siiown in Fig. 1, through which the pointers 1 andcolumns of fi ures upon the plate 6 may be seen, but wdiich plateconceals the cohmns of figures use The plate 6 has upon it, see Figs. 11and 12, two columns of figures a used in addition for each slide 2, thefigures being arranged alternately upon either side of the slide 2 sothat the even` numbers are all in one column i and theodd in the otherand by means of which arrangement the figures are more easily read; andtwo other similarly arranged columns of supplementary figures for eachslide used in subtraction; the cover plate 11, however, concealing thecolumns not to be used so that the columns visible through the slotsthereof will be either all addition orall .willbe 1.

subtraction columns as will be understood from Fig; 1 wherein the.columns visible are -for use 1n addition.

Referring further to Figs. 11 and 12, one addition column a contains theeven numbers 0-2-4--6 and 8 while the other contains the odd numbersl1--3--5--7 and 9, these two columns being so spaced that they will beupon op oste sides of the slide 2, lso that one of t e pointers 1 of aslide will move over even numbers while. the other moves over oddnumbers, it being understood that the arrangement above specified isrepeated for each slide. Fig. 7 shows the number plate 6 setforadditlon, while Fig. 12 shows the plate set for subtraction in whichprocess columns b of supplemental figures are utilized, these .havingodd numbers arindicate the number 204 while in Fig. 12`

they indicate 7 96 the sum of which is 1,000, a 1 followed by naughts orciphers. This arrangement is followed throughout all the columns uponthe plate 6, and the sum of the addition and subtract-ion readings witha given position of slides will always be all naughts exce yt 'the lefthand ure which Tliis requirement wil be seen t', result in that the sumof an addition and a subtraction number which the pointer on the righthand or units slide 2 may point to, forl example'4 and 6, will always be10; while for all the other slides the sum 'of an additionand asubtraction number which ag' longitudinally of the plate 6, or acrossthe machine', and the saine is true of like num; bers in all thesubtraction columns exceit those for the right hand or units slide, thesubtraction numbers of which are depressedone space. This follows fromthe consideration that. while in all columns except the units columnsthe sum of the numbers which a pointer may indicate is 9, in the unitscolumns it 'is mustbe shifted one space to secure an a1- rangement offigures the sum of which will be 10, and the subtraction columns aredisplaced as being of the least inconvenience to the user. This bringsthe naught of the subtraction columns one space below the lowesttransverse line of addition figures and below the bottoms of all theother columns as shown.

The slides 2 have columns of figures c as shown in Figs. 11 and 12, ythecolumn upon the left being an addition and that on the right asubtraction column, and 14 is a bar carried byv the plate 6 and having ahole 15 for each slide 2 which hole comes over an addition lor asubtraction column e according to the position of the slide 6, so that afigure of one or another of the columns may be seen through it; and thecover plate 11 has slots 13 long enough to permit the holes 15 to beseen when over either an addition or a subtraction column c.

Referring now to Fig. 11 the slides 2 are set t0 indicate the number 204which is to be added to Whatever amount may have been previouslyaccumulated in the total indicating mechanism as' hereinafter explained,and this same number may be read through the slots 13 and holes 15 whichelements are provided for the purpose of checking the setting operationperformed upon y the slides 2.

Fig.' 12 shows the slides 2'v set to indicate the number 796 bpth in thecolumns b and holes 15, which number is to be taken from whatever may beindicated by the indicating mechanism, it being understood that in thecomplete machine all figures upon the plate 6 except the columns a or band the columns uplon the slides except the figures ini line Wit theholes 15, will be concealed by the cover plate 11.

27 is a bar beneath the horizontal portion of the` casing 7 and bestshown in Fig. 2` which extends transverse to the machine and is movableacross the machine, and to which spuug-pressed pawls 24 corresponding innumber with the slides 2 and racks 22 are pivoted as at 25, which pawlspermit the racks to move freely in setting the slides but engage andprevent areturn movement thereof, thereby 4temporarily holding the racks1n whatever position they may be moved into by the knobs 3 in settingthe slides. J e i 26 are springs carried by the bar 27 and 10; so thatone of the columns serving to press the pawls toward the racks, and l23are springs, one for each slide 2, located beneath the racks` and theurpose of which is to return the racks and s' ides to their, 'original'position when the pawls 24 are moved so as to disengage and release theracks as will hereinafter appear. One end.

of each of these springs is connected with the pin 43 above referred to,and the other end 1s connected to the frame or casing of the machine asshown. w

The total indicatingmechanism includes a bar 19 'within the casing 7 andmovable across the machine, and carrying a series 'of upright pins 18corresponding in 'number wlt-h the slides 2 and u on each of which pinsa number wheel 17 1s SuDDorted, which wheels are provided with hubs 20,andwith pinions 21 at their lower ends, See Fig. 9,

. which pinions-'when the bar 19 is moved to the right will be broughtinto with the racks 22, and when movedfv-to the left will ,be disengagedfrom the racks. The number wheels 17 have figures 0 to 9 and the pinions21 have each ten engagement said bar is teeth, the same in-number as thenumber of figures upon the number wheels. These numberf wheels arelrotated in a counter clockwise direction by means 22 as they moveforward or away from the operator, the pinions 21 having been broughtinto engagement with the racks as aforesaid. One-figure only of eachnumber wheel isvisible through a seriesof holes formed in the casing 7as shown in Fig. 1, and the figures thus appearing represent the totalnet result of the preceding operations of the machine. .Y p A 28 areguides forthe bars 19 and 27, a guidel being placed upon either side'ofthe machinevso that eachl end of the bars referred to is supported.

The bars 19 and 27 are operated to move the pinions 21 into engaementwith the racks 22-and to' disengage t e pawls 24 from the racks,for which purpose each pawl has av pin projecting into a recess formedin the bar 27 as shown in Fig. 2 and within which recesses the pins havea limited movement, by means of an operating member in the form of areciprocating slide 29 located beneath the-horizontal,portion of thecasing 7 and movable longitudinally of the machine, which o eratmgmember is provided with. a cam sot 32 .with whichJa pin 34 carried bythe bar 19 engages, and with a second cam slot 33 withwhich a in 35carried` b the bar 27 engages, the said cam slots having offsetportions, as vshown in Fig. 3, by means of which` construction andarrangement transverse movements will be communicated to the. bars 19`and 27 as the operating vslide is reciprocated, as will be understood, iThe slide29 is'operated by a knobr'or handle '30 movablel in 'a s1ot- 31tion of the cam slot 32 of the racks i formed in the casing 7 as shownin Fi 1 and which slot forms a guide'` for one en of the slide 29, theother end thereof being guided by a pin 49 movable in a second slotformed also in the casing 7.

The relative arrangement of the parts above referred to is such that asthe operating slide 29 is moved downward from the position shown inFigs. 1 and 3, which will commonly be toward the operator, the bar 19 isfirst moved to the right as the olset porengages the pin 34 to therebyTmove t-he pinions 21 into engagement with the racks 22, after which thebar 27 is'moved to the left as the offset portion of'the cam slot 33engages the pin 35 to thereby move the pawls 24 out of engagement withthe racks 22.' The racks are now in engagement' with the pinions 21 and,the pawls 24 having been disengaged from them, the racks are free toreturn to their original positions under the influence of the springs23, during which movement rotary motion will be communicated to theseveral number wheels 17 and they will, at the end* of such returnmovement, register or indicate a number corresponding with the numberfor which t-he slides were set, assuming the Wheels to have been intheir initial or zero positions. The operating slide 29 is then moved uWard or awayv from the operator, the eect of which will obviously be thereverse of the operations upon the bars above explained, that is the bar27 will be first moved so as to brin the pawls 24 into'engagement` Withthe rac s 22, after which the pinions 21 will be moved away from and outof en-y gagement with the racks 22 so that the` slides 2 and racks maybe set to correspond with a number to be next added to oi' Sub-` traotedfrom the amount or remainder 1ndicated by the several number wheels asseen through the holes in the casing.

The operation thus far explained Adoes not contemplate transfermechanlsm for advancing any given number Wheel 17 .gone place as thenumber wheel neXt to the right of it completes a rotation.

The construction and operationv the a.

transfer mechanism forming a part of the. machine 1s as follows:

The pins 4,3 .whereby y the slides 2 and the racks 22 are .connected` ytogether extend upward througlithe slots 44 as aforesaid Which slotsform guides for the pins.

levers,

pivoted at 37 to the casing 7 and-thelon er -arm of which is. providedwith Va vhook lyingnormally in the path'of movement ofgthej pins 43 andwhich pins, and consequently The reference characters irll dicate aseries of right-angled or elbow# one for each slide` 2 and 'rack v22,

hooks form a stop for the for-the racks. 22 and.

slides 2, when the slides have returnedpto their original positions land.the f pointers f Whichtli'ey carry again indicate'naughtv number wheelto the wheel of the next higher order, vbeing the wheel next toward theleft, the slide and rack which operate the number wheel of the nexthigher order referred to go back or return one space beyond theiroriginal position in which the pointerindicates (0), or one space beyondthe position in which they will normally be arrestedby the hooked end ofthe lever 36, thereby turning the number wheel of the rack and slide inquestion one space or number farther than it would be turned by its rackwere not such further movement permitted, whereby the number wheel inquestion is caused to indicate a number greater by one (1) than thenumber it would indicate because of the position intowhich its slide wasadjusted or set. The shorter arms of the levers 36 are ivotallyconnected each with a rod 39, an' the upper ends of the said rods arerovided with pins 40 which bear against t e periphery of the numberwheels 17. 41 is a guide plate having slots wherein the pins 40 areguided, and 38 are springs, one for each lever, in engagement with theshort' arms of the levers and which press the pins 40 against theperipheries of the number wheels as shown in Fig. 10. The periphery ofeach number wheel has a slot 16 at the portion thereof occupied by thefigure naught (O) throu h which the pins 40 will pass when the sfot isopposite the pin, and the wheels 17 are beveled interiorly as shown inFig. 9 so that the pins may slide over the edge of the wheels whensuchpins as have passed through slots 16 are withdrawn from the interior ofthe wheels as will appear hereinafter. From the above it will be seenthat when any pin 40 passes through a slot 16 the hook at the end of thelong arm of' the lever 36 will be swung to the left, thereby releasingthe pin 43 and rack and slide 2 which operate the number wheel .which isnext tothe left and consequently of the next hi her order, thuspermitting the rack and s 1de-to move back one space beyond theirinitial position as above explained.

The transfer mechanism above disclosed is controlled by the operatingslide 29 as follows 45 is a reciprocating bar extending across themachine as shown in Figs. 3 and 10 and provided with suitable guides,and 46 is a link pivoted to the casing 7 at 47` and the free end ofwhich is connected with the hand end of the bar 45 andl which link isprovided with a curved cam slot 48 in which a p'in 49 carried by theoperating slide 29 travels as the slidef is operated. The arrangement ofthe parts, as shown in Fig. 3, is such that during the first part of themovement of the slide toward the operator the bar 45 will be moved tothe left by the action of the pin 49 in the slot 48 while during thelatter part of the movement of said operating slide the bar will remainat rest or will have very little movement. The bar 45 has a plurality ofpins 42, one for each lever 36, which pins, When the bar is in its righthand position as shown in Fig. 3, engage the ends of the longer arms ofthe levers 36 as shown. As the bar 45 is moved to the left as aforesaidthe pins 42 are moved away from the levers 36, thereby permitting thesprings 38 to force the pins 40 toward the eripheries of the severalnumber -wheels 117, whereupon the pins 40 will enter the interiors ofsuch of the number wheels as may be in position such that the slot 1Gthereof is in line with the pins 40, while the pins 40 will rest againstthe peripheries of the other number wheels. This will place the transfermechanism in condition such that the required tens transfers will beeffected as above explained when the several racks and slides arereleased as explained at the end of the movement of the operating slide29, it being remembered that the bar 45 is operated to setI the transfermechanism during the first part of the movement of the slide 29 andbefore the racks and slides are released. As the slide 29 is moved awayfrom the operator and during the last part of its movement the bar 45will be moved to the right, the effect of which is to swing such ofthelevers 36 as may have been operated because of their pins 40 passingthrough the slots 16, back into their original positions therebywithdrawing the pins 4() from the interior of the number wheels 17. Thebar 45 also forms a stop for limiting the excess backward or reabovereferred to and for returning the Yslides to a zero position, to whichend the bar is provided with recesses 50 corresponding in number withthe slides, which recesses have inclined walls. As the slides returnbeyond their naught or zero position the bottoms of the recesses 50 areengaged by the pins 43 to 'limit the return movement to one space beyondthe naught or zero positions, and, as the bar moves to the right theinclined walls of the recesses engage the pins 43 and move the racks andslides one space, so that the pointers will all point to naught (0) thusplacing them in condition such that they may be adj usted or set tocorrespond with a new number to be added or subtracted. A

As explained above, the right hand or units slide and rack vmust becapable of. movement one space below the lower ends of the severalcolumns of figures upon the number plate 6 when the machine is used forsubtraction, but not when used for addition, t-o which end a pin 51,Fig. 2, is provided upon theunder side of the plate 6 which dependsthrough a slot in the casing 7 and comes adjacent the rack 22 of theturn movement of the several racks and slides it-s end which stop unitsslide. The units slide has a stop 52 at contacts with the pin 51, Whenthe machine is set for addition and the units slide ward the o erator,when the pointer 1 reaches the gottom of a column upon the number plateand points to the addition number 9. When, however, the machine is andoperable by a is carried .at the to be used for subtraction themovementof the number plate 6 will carry the pin 51 out of line with thestop 52, and the slide may then be moved farther to bring the pointer 1one space below the lower ends of the columns of addition fi res.

Means are provide for preventing rotary movement of the several numberwheels 17 when they are not in engagement with the racks 22 as follows:59 is a bar extending transverse to the machine and located adJacent thepinions 21 and having lock hooks 58 adapted to engage the pinions asshown in Figs. 3 and 6. The bar 59 is prevented from moving to the rightfarther than the position in which it is shown in these figures; fromwhch it is obvious that the pinions and number wheels are locked andprevented from rotatin when the parts are in the positions shown, butthat the pinions, upon being moved to the right as aforesa1d,will bemoved away from the lock hooks and brought into contact with the racks21. After having been turned by the racks the pinions are returned t0the left and brought into en agement with the lock hooks as will beunderstood. The bar, 59, is, however, capable of movement to the left',a spring 60 being provided for opposing such movement. This movement ofthe bar 59 to the left from the position shown in Figs. 3 and 6 is forthe purpose of releasin the pinions 21 to allow 'them to be returned totheir zero positions b setting mechanism as fo lows: Secured to thelower ends of the several inions 21, see Figs. 7 to 9, are heart-sha ecams 53, and 54 are a `series of pins ad)apted, to en age the cams andwhich pins are carried y a bar 55 movable transverse to the machinevhandle or knob 56, a rovided for returning the bar to its right andposition and keepin itthere when not pressed to the left by theoperator. The bar 55 is provided with a lug 63 which is adapted to engalug 61 attached to the locking bar 59. his lug 61 free end of a flatspring 62 secured tothe bar 59, and said lug is beveled and adapted toenga a stationary lu 64, whereby the lug 61 will be lifted, as w1 l beunderstood from Fig. 9. v u

Such being the construction of the zerospring 65 being settingmechanism, it l will be v understood.

is drawn downward or -tomeans of zeroand 61 thus movin the lock hooks 58out of engagement wit the pinions 21. The 'pins 54 will presently engagethe heartshaped cams 53'and will rotate them until the cams assume Athepositions shown in Fig. 8 at which time the number wheels will have beenall returned to their zero-positions. At this time the lug 61 comes intoen agement with the fixed lug 64, whereupon t e lu 61 is lifted and thelocking bar 59 freed rom the bar 55, and moved to the right by thespring 60 and the lock 'hooks 58 again brought into engagement with thepinions 21 to lock'thenumber wheels in thelr zero positions.

The opera-tions of the various separate mechanisms of my device havebeen herein-` before explained. The operation of the machine as a Wholein performing operations of addition or subtraction will be understoodfrom the following: Assume that 734 and 648 are to be added. The slides2 and racks 22 are moved toward the operator or downward, the pointer 1on the units slide being moved to 4, that o f the tens slide to 3 and ofthe hundreds slide to 7, the pointers of all tliefother slides pointingto 0. The number 734 is thus set. The operating slide 29 is now moveddownward or toward the operator whereupon the pinions 21 are moved intocontact with the racks 22 and the racks released so that they mayrot-ate the number wheels 17. The slide is then returned to its originalposition, whereupon the number wheels will indicate the number 00000734and the several wheels will be locked in The the againoperated,whereupon the number 648 will be added tothe number alread yindicated bythe numberwheels, the tota result being 00001382. The mechanicaloperations several slides are next set to indicate are precisely thesame if'subtra'ction is to 11o not in use must be setto indicatenauglit(0)4 POmterS u on thesubtraction scale. lThe u, will Subtlf?`l en set toindicate 648 upon the tion columns will, if for experiment and' number648, and the operating slide 29 position by the lock hooks 58.

lorder to better understand the operation of the machine the number lateis' moved, into its addition position, incicate 9999952 ,-t1 1e ointersand racks-not 'having beeumoved. gVhen, therefore, the slides` set tosubtract the number and permitted to return to their initial'poisit-ion, an addition be process will i'n reality performed by the asexplained, are m1611993 5 mechanical elements of the machine, whichprocess may be expressed Multiplication may obviously be accom# plishedas a series of addition operations,

' brought into enga and division as a series of subtractions, alt-houghmy machine is more especially designed for addition and lsubtractionoperations.

Havin thus described my invention and explaine the operation thereof, Iclaim and desire to secure by Letters Patent:

1. Ina calculating machine, a series of reciprocating vracks arrangedparallel with one another means for temporarily retaining said racks inthe positions into which the may be moved; means for automaticalreturning said racks to their initial positions; a graduated scale; apointer cnnected with each of said racks and movable adjacent saidscale; a reciprocating bar arranged transverse to said racks; a seriesof number Wheels, one for each rack, carried by said bar and each ofwhich has a pinion, said pinions being normally out of engagelnent withsaid racks but adapted to be ement therewith by a movement of said ar;means for moving said bar to move said pinions into engagement with saidracks; and`v means acting upon the temporary retaining means aforesaidfor releasing said racks.

2..In a calculating machine, a series of reciprocating racks arrangedparallel with one another; a spring for each of said racks, the tendencyof which is to return the rack to its initial positionv after it hasbeen moved therefrom; a graduated scale; a pointer connected with eachof said racks and movable adjacent said scale; ya reciprocating bararranged transverse to said racks; a series of number wheels, one foreach rack, carried by said bar and each of which has a pinion, saidpinions being normally out o engagement with said racks but ada tedetobebrought into en a ement therewitlli by a movement of sai ar; a secondreci rocating bar arranged transverse to sai racks; a series of pawls,one for each rack, carried by said second bar and said pawls beingnormally in en agement with said racks but adapted to e disenga edtherefrom by a movement of said secon bar; means for moving said firstmentioned bar to move said pinions into engagement with said racks; andmeans for moving said second bar to move said pawls out of engagementwith said racks.

s. In s emulating' machine, a serie-s ef reciprocating racks arrangedparallel with one another; a spring for each of said racks, the tendencyof which is to return the rack to its initial position after it has beenmoved therefrom; a graduated scale; a pointer connected with each ofsaid racks and movable adjacent said scale; areciprocating bar arrangedtransverse to said racks; a seria-.fs o f number wheels, one for eachrack, carried by said bar and each of which has a pinion, said pinionsbeing normally out of engagement with said racks but adapted to` bebrought into engagement therewith by a movement of said bar; a secondreciprocating bar arranged transverse to said racks; a series of pawls,one for each rack, carried by said second bar and said pawls beingnormally in engagement with said racks but adapted to be disengagedtherefrom by a` movement of said second bar; a reciprocating operatingslide having two cam slots; a pin carried by said first mentioned barand adapted to enga eone of the cam slots of said operating side; and apin carried by said second bar and adapted to engage the other cam slotof said operating slide.

4. In a calculating machlne, a plurality of adjustable slides, each ofwhich is providedwith two pointers arranged one upon either sidethereof; and a number plate having two columns of figures for each ofsaid slides the same being arranged one upon either side of each slideand over which the pointers of said slide move, one of said columnsbeing ieade up of even and the other of odd num- 5. In a calculatingmachine, a plurality of adjustable slides, each of which is providedwith two pointers arranged one upon either side thereof; a movablenumber'plate having four columns of figures for each of said slides, twobeing for use in addition and two in subtraction operations, the columnsbeing so arranged that the addition or the subtraction columns will beone upon either side of each slide and over which two columns theointers of said slide move, and each in.

divi ual column being made up of even vor of odd numbers; and means formoving sald number plate so as to bring all the addition or all thesubtractioncolumns beneath said pointers.

6. In a calculating machine, a plurality of adjustable slides, each ofwhich 1s provided with two pointers arranged one upon either sidethereof; a number plate movable transverse to said pointers andhavingfour col'- umns of figures for each of said slides, two being foruse in addition and two in subtraction operations, the columns being soarranged that the addition or the subtraction columns will be one uponeither side of. each slide and over which two columns the pointers ofsaid slide move, and each individual column being made up of even or ofodd I to be disengaged numbers; means for moving said number plate so asto bring all the addition or all the subtraction columns beneath saidpointers; and a stationary cover plate having slots through which thepointers and the columns of figures beneath them are visible, but whichconceals the columns not in use.

7. In a calculating machine, a series of racks arranged parallel withone another and movable from a given initial position in one directioninto various positions toindicate a number to be added, and movable in areverse direction into positions beyond their initial positions, each ofsaid racks having a stop; a series of number wheels, one for each rack,each of which has a pinion engaged by one of said racks and throughwhich sald number Wheels are rotated, and each number wheel having aslot formed in its periphery; a series of oscillating levers, one foreach rack, one arm of each of which levers has a hook adapted to enga ethe stop aforesaid of a rack to arrest t e reverse 5 movementv thereof,and the other arm of which is connected with a rod, the free end ofwhich rod has a pin adapted to bear against the periphery of the numberWheel o the next lower order than the number 0 wheel operated by therack the movement of which a particular lever arrests, or to enter theslot of said number wheel; a spring acting upon each lever to swing thehooked end of such levers asare released by the pinof their rod enteringthe slot of a number wheel as aforesaid away from the stop which 'it.normally enga es to thereby release its rack; and means or returningsuchgracks as may have moved beyond their initial positions asaforesaid, and such. levers as may have been swung as aforesaid, back totheir initial positions.

8. In a calculati machine, a series of racks arranged parailIel with oneanother and movable from a given initial position in one direction intovariousl positions to indicate a number to be added, and movable in areverse direction into positions beyond their initial positions, each ofsaid racks having a sto a spring for each rack, the tendency of whichis. tomove the rack in a reverse direction as arranged transverse tosaid racks; a series of number wheels, one for each rack, carried bysaid bar and each of which has a pinion, said'pinions being normally outof engagement with said racks but adapted to be in engagement with saidracksbut adapted aforesaid; a reciprocatin barV therefrom by a movementof said second bar; a series of oscillating levers, one for each rack,one arm of eac -of which levers has'a hook adapted to engage the stopaforesaid of a rack to arrest the reverse movement thereof, and theother arr'n of which is connected with a rod, the free end of which rodhas a pin adapted to bear against wheelv of the next lower order thanthe number wheel operated by the rack the movement of which a particularlever arrests, or toV enter the slot of said number wheel; a springacting upon each lever to-swing the hooked end of such levers as arereleased by the pin of their rod entering the slot of a number `wheel asaforesaid away from the stop which it normally engages to therebyrelease 4its rack; means for movingsaid first mentioned Vbar to movesaid pinions.

the periphery of the number intoengagement with said racks; means formoving said second bar to move said pawls out of engagement with saidracks; and means for returning such racks as may have been moved beyondtheir initial positions as aforesaid, and such levers as may have beenswung'as aforesaid, back to their initial positions.

9. In a calculating machine, a series of racks arranged parallel withone another and movable from a given initial position in onedirectioninto various positions to indicate a number to be added, andmovable in a reverse direction into positions beyond their initialpositions, each of said racks having a stop; a spring for each rack; thetendency of which is to movethe rack in a reverse direction asaforesaid; a reciprocating bar arranged transverse to said racks; aseries of number wheels, one for each rack, carried by said bar and eachof which has a pinion, said pinions being normally out of engagementwith saidracks but adaptedl to be brought into engagement therewith by amovement of said bar, and each of which number wheels has a slot formed1n its periphery; a second reciprocating bar arranged transverse to saidracks; a series of pawls, one for each rack, carried by said second barand said pawls being normally in engagement with said racksbut adaptedto be dlsengaged therefrom by a movement of saidl second bar; `a seriesof oscillating levers, one for each rack, one Yarm ofl each of whichlevers has a hook adapted to engage the stop aforesaid `of a rack toarrest the reverse movement thereof, and the other arm of which isconnected with a rod, the' free end of which rod has a pin adapted tobear against the periphery of the number wheel of the next lower orderthan the number-wheel operated by the rack the movement of which aparticular lever arrests, or to enter the slot of said number wheel; a

spring acting upon each lever to swing the hooked end of such levers asare released by the'rpin of their rod entering the slot of a numberwheel as aforesaid away from the stop which it normally engages tothereby release its rack; a reciprocating operating slidehaving aprojecting pin and havin also two cam slots; a pin carried by said firstmentioned bar and adaptedto engage one of the cam slots of saidoperating slide; a pin carried by ed to engage the other cam operatingslide; a reciprocatin a series of inclined portions a apted to engagethe stops of such racks as may have moved beyond their initial`positions as aforesaid to thereby move them back to their initialpositions, and havingalso a series slot of said bar having of pinsadapted to engage by .the hooked i said pinions reciprocating racks;

ends of such levers as may have been swung as aforesaid to thereby movethem back to their initial positions; and a pivoted link connected withsaid last mentioned bar and having a cani slot in which the pin of saidoperatin slide moves.

10. In a cculating machine, a series of a reciprocating bar arrangedtransverse to said racks; a series of number wheels, one for each rack,carried by said bar and each of which has a'pinion,

being normally ont of engagement with said racks but adapted to bebrought into engagement therewith by a movement of said bar; and a lockbar arranged transverse to said racks and having said second barandadapt-I a series of lock hooks, one for each pinion, into engagementwith which lock hooks said pinions arev brought as said pinions aremoved away from said racks.

1l. In a calculating machine, a series of reciprocating racks; areciprocating bar arranged transverse to said racks; aseries of numberwheels, one for each rack, carried by said bar and each of which has apinion, said pinions being normally out of engagementwith said racks butadapted to be brought into engagement therewith by a movement of saidbar; a lock bar arranged transverse to 'said racks and having a series'of lock hooks, one for each pinion, into engagement with which lockhooks said pinions are brought as said. pinions are moved away from saidracks; a heart-shaped cam connected with-each of said number Wheels; areciprocating setting bar arranged transverse to said racks and having apin adapted to engage each cam; a lug carried by said setting bar andadapted to engage a second lug upon the free end of a spring carried byJEAN GULDEN, HERMANN Hurra.

`said lock bar; and a lug with Which the lug I

